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Email Domain Authentication Checker (SPF, DKIM, DMARC)

Try for free

Audit any list of domains for email deliverability: SPF (with DNS lookup count), DKIM keys on 45 common selectors, DMARC policy and reporting, MX, BIMI, MTA-STS and TLS-RPT. Each domain gets a 0-100 score, a grade and plain-English fixes.

Pricing

Pay per event

Rating

0.0

(0)

Developer

Ian McCann

Actor stats

Bookmarked

Total users

Monthly active users

10 days ago

Last modified

What does Email Domain Authentication Checker do?

It checks the DNS records that decide whether a domain's email lands in the inbox, for any number of domains at once:

Check	What it looks at
SPF	Record present, duplicates, `~all` / `-all` ending, and the 10 DNS lookup limit (counted through nested includes)
DKIM	Public keys on about 45 common selectors (Google Workspace, Microsoft 365, SendGrid, Mailchimp, Klaviyo, HubSpot, Zoho, Amazon SES and more), plus your own selectors
DMARC	Record present, policy (`none` / `quarantine` / `reject`), subdomain policy, `pct`, and `rua` reporting addresses
MX	Whether the domain can receive mail
BIMI, MTA-STS, TLS-RPT	Extra trust and transport security records

Every domain gets a 0-100 score, a grade from A to F, and a list of issues written as fixes.

Who is it for?

Cold email and outbound teams checking their own sending domains and inboxes before a campaign
Agencies and MSPs auditing client domains in bulk, and finding prospects who need help (for example, no DMARC)
Email marketers preparing for Gmail and Yahoo sender requirements (SPF or DKIM plus DMARC)
Security teams spotting domains that can be spoofed

How to use it

Enter domains, one per line. Website URLs and email addresses also work.
If you know your DKIM selector, add it under Extra DKIM selectors.
Run and sort by score.

Input example

{ "domains": ["apify.com", "wordpress.org", "example.com"] }

Output example (shortened)

{
  "domain": "example-shop.com",
  "grade": "C",
  "score": 65,
  "issues": [
    "DMARC policy is p=none: spoofed mail is still delivered. Move to quarantine or reject once reports look clean.",
    "SPF needs 12 DNS lookups (limit is 10): SPF will fail (permerror)."
  ],
  "spf": { "found": true, "allQualifier": "~all", "dnsLookups": 12, "multipleRecords": false },
  "dmarc": { "found": true, "policy": "none", "reportingAddresses": ["dmarc@example-shop.com"] },
  "dkim": { "checked": true, "selectorsFound": ["google", "k1"] }
}

How much does it cost?

Event	Price
Actor start	$0.001 per run
Domain checked	$0.003 per domain

1,000 domains cost about $3.

Notes

Only public DNS records are read. No email is sent.
DKIM keys can only be found on selectors that are tried. If your provider uses a custom selector, add it to the input; otherwise a missing DKIM result means "not found on common selectors", not "definitely missing".
Provider names are used only to describe results; this tool is not affiliated with any provider.

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